From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jody Bruchon Subject: Re: An "ELKS BusyBox" is in progress; 24.5% size savings so far! Date: Wed, 22 Feb 2012 09:42:32 -0500 Message-ID: <4F44FED8.4030706@jodybruchon.com> References: <4F41E046.6000208@jodybruchon.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-8086-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-8086@vger.kernel.org On 2/20/2012 1:16 AM, Kirn Gill wrote: > Most of the space-savings comes from not having to duplicate the C > library around (due to static linking). If there was a shared library > mechanism (which someone once suggested via interrupt vectors - does > that even work?), then this space-savings would be far less. That's not entirely true. Some of the commands are from sash, and have tons of 1:1 copied code to split them into separate commands, and I have fixed that up; some other commands shared routines as well, and those are also combined. The C library is not the only duplication waste involved. Additionally, commands like "true" and "false" are so trivial that their .c files were destroyed in favor of pushing their code into a single line in busyelks.c. I have yet to merge the usage() calls together, but I've already packed a lot of stuff into one executable, and it works as expected using the elksemu command. Once I get some of the ugliness fixed up, I'll push this to Git. 13682 ./sed.o 13058 ./stty.o 11599 ./compress.o 10680 ./diff.o 8806 ./find.o 8582 ./sort.o 8423 ./ed.o 5592 ./banner.o 3647 ./tar.o 3549 ./ls.o 3105 ./cut.o 3021 ./test.o 2633 ./grep.o 2593 ./dd.o 2565 ./tail.o 2347 ./cal.o 2254 ./sash.o 2003 ./tr.o 1897 ./cksum.o 1869 ./date.o 1771 ./uniq.o 1696 ./xargs.o 1594 ./lib/wildcards.o 1594 ./du.o 1526 ./wc.o 1475 ./l.o 1419 ./busyelks.o 1299 ./write.o 985 ./cmp.o 820 ./head.o 785 ./more.o 779 ./mkdir.o 764 ./lib/copyfile.o 762 ./tee.o 738 ./rmdir.o 699 ./mknod.o 697 ./mesg.o 676 ./ln.o 580 ./cat.o 571 ./which.o 569 ./lib/sashlib.o 509 ./mv.o 477 ./chgrp.o 476 ./chown.o 437 ./lib/modestring.o 430 ./printenv.o 420 ./basename.o 358 ./mkfifo.o 343 ./chmod.o 334 ./cp.o 326 ./rm.o 314 ./dirname.o 301 ./touch.o 287 ./lib/timestring.o 269 ./lib/chunks.o 262 ./lib/buildname.o 243 ./echo.o 238 ./whoami.o 233 ./logname.o 201 ./yes.o 194 ./pwd.o 179 ./lib/stripslash.o 139 ./lib/isadir.o 134 ./usage.o 132 ./lib/basename.o text data bss dec hex filename 51904 7576 37124 96604 1795c busyelks -rwxr-xr-x 1 root root 59512 Feb 22 09:33 busyelks* Jody Bruchon